
class FooGraParent(object):
    def bar(self,message):
        print (message,'from GraParent')

class FooParent(FooGraParent):
    def bar(self,message):
        print (message,'from Parent')

class FooChild(FooParent):        
    def bar(self,message):
        super().super().bar(message)
        super(FooChild, self).bar(message)
        print (message,'from Child')

if __name__ == '__main__':
    fooChild = FooChild()
    fooChild.bar('HelloWorld')